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i out into the same plane.

LUDYVIG HIRSOH, OF NEV YORK, N. Y.

RULE AND SQUARE.

SPECIFICATION forming part of Letters Patent No. 329,555, dated November 3,1885.

Application filed April 10, 1884. Serial No. 127,278. (No model.)

T0 all whom it may concernf Be it known that I, L. HrRsoH, of New York, in the county of New York and State of New York have invented a certain new and useful Improvement in Rules and Squares, of which the following is a specification.

My improveinent consists in a rule and square composed of two limbs, which are made of any suitable material, and are rectangular at their free ends. Said limbs are marked on one or more of their sides or edges with a scale ofinches, and have parallel sidesthrough out their lengths, their meeting ends extend obliquely to their lengths, and are connected' by a hinge, whereby they may be folded one over another or swung out into the same plane at right angles to each other.

In the accompanying drawings, Figure 1 is an edge view of a rule and square embodying my iniprovement and showing the device as folded; and Fig. 2 is a plan or face view of the rule and square with the limbs extended Fig. 3 is a view of the joint, showing tae structure of the hinge and pintle.

Similar letters of reference designate corresponding parts in all the figures.

The rule and square is composed of two limbs, A B, made of any suitable materialsuch, for instance, as `wood or metal. These 'limbs are rectangular at their free ends, and

and the ends of this pintle and of the leaves of the hinge are so shaped that they correspond With the inner and outer ruling-edges of the squarethat is, at the meeting angle on the inside a right-angled recess is formed in the end of the hinge, so that it becomes a continuation of the inner straight edges. Likewise the outer end of the pintle is beveled to an edge to coincide with the outer edges of the rule. The limbs of the rule may be folded over, one on the other, Or extended into the same plane at right angles to each other, so

as to form a square. Said limbs have parallel sides throughou'i their lengths.

It will be seen that by my improvement I produce an article which may be used as a rule or a square, and which is of very cheap and simple construction.

I am aware that a folding` square has been made consisting of two parts hinged together,

so as to fold down flat upon each other and to stand at right angles when opened. In that device, however, the arms are widened at the joint, so that the interior inner straight edges do not intersect, and hence do not form and cannot be used as a square.

In my device the inner edges intersa-ct at right angles, theapex of the angle being LUDVIG HIRSCH.

fitnesscsz T. J. KENE, E. T. Rooi-IE. 

